Number of 2Xn 0..2 arrays with exactly floor(2Xn/2) elements equal to at least one horizontal or antidiagonal neighbor, with new values introduced in row major 0..2 order.
A223105
Number of 2Xn 0..2 arrays with exactly floor(2Xn/2) elements equal to at least one horizontal or antidiagonal neighbor, with new values introduced in row major 0..2 order.
Terms
- a(0) =0a(1) =6a(2) =24a(3) =225a(4) =1456a(5) =11874a(6) =86726a(7) =681306a(8) =5213490a(9) =40813074a(10) =318018986a(11) =2499530547a(12) =19657584586a(13) =155231158734
External references
- oeis: A223105